Wraps the uploaded logo in the same avatar shape as the initials
fallback (so the header doesn't jump in size depending on whether a
club has one) and adds a ring in the club's own primary colour as a
plain border around it.
Also hints the browser to use its higher-quality image scaler: a
club's raster logo is often much smaller than the badge it's shown in,
and the default upscaling in some engines reads as pixelated. Doesn't
affect SVG logos, which scale losslessly regardless.
Bernard Siebens
a86c35cbe7